1 /* 2 * arch/ppc64/kernel/iomap.c 3 * 4 * ppc64 "iomap" interface implementation. 5 * 6 * (C) Copyright 2004 Linus Torvalds 7 */ 8 #include <linux/init.h> 9 #include <linux/pci.h> 10 #include <linux/mm.h> 11 #include <asm/io.h> 12 13 /* 14 * Here comes the ppc64 implementation of the IOMAP 15 * interfaces. 16 */ 17 unsigned int fastcall ioread8(void __iomem *addr) 18 { 19 return readb(addr); 20 } 21 unsigned int fastcall ioread16(void __iomem *addr) 22 { 23 return readw(addr); 24 } 25 unsigned int fastcall ioread16be(void __iomem *addr) 26 { 27 return in_be16(addr); 28 } 29 unsigned int fastcall ioread32(void __iomem *addr) 30 { 31 return readl(addr); 32 } 33 unsigned int fastcall ioread32be(void __iomem *addr) 34 { 35 return in_be32(addr); 36 } 37 EXPORT_SYMBOL(ioread8); 38 EXPORT_SYMBOL(ioread16); 39 EXPORT_SYMBOL(ioread16be); 40 EXPORT_SYMBOL(ioread32); 41 EXPORT_SYMBOL(ioread32be); 42 43 void fastcall iowrite8(u8 val, void __iomem *addr) 44 { 45 writeb(val, addr); 46 } 47 void fastcall iowrite16(u16 val, void __iomem *addr) 48 { 49 writew(val, addr); 50 } 51 void fastcall iowrite16be(u16 val, void __iomem *addr) 52 { 53 out_be16(addr, val); 54 } 55 void fastcall iowrite32(u32 val, void __iomem *addr) 56 { 57 writel(val, addr); 58 } 59 void fastcall iowrite32be(u32 val, void __iomem *addr) 60 { 61 out_be32(addr, val); 62 } 63 EXPORT_SYMBOL(iowrite8); 64 EXPORT_SYMBOL(iowrite16); 65 EXPORT_SYMBOL(iowrite16be); 66 EXPORT_SYMBOL(iowrite32); 67 EXPORT_SYMBOL(iowrite32be); 68 69 /* 70 * These are the "repeat read/write" functions. Note the 71 * non-CPU byte order. We do things in "IO byteorder" 72 * here. 73 * 74 * FIXME! We could make these do EEH handling if we really 75 * wanted. Not clear if we do. 76 */ 77 void ioread8_rep(void __iomem *addr, void *dst, unsigned long count) 78 { 79 _insb((u8 __iomem *) addr, dst, count); 80 } 81 void ioread16_rep(void __iomem *addr, void *dst, unsigned long count) 82 { 83 _insw_ns((u16 __iomem *) addr, dst, count); 84 } 85 void ioread32_rep(void __iomem *addr, void *dst, unsigned long count) 86 { 87 _insl_ns((u32 __iomem *) addr, dst, count); 88 } 89 EXPORT_SYMBOL(ioread8_rep); 90 EXPORT_SYMBOL(ioread16_rep); 91 EXPORT_SYMBOL(ioread32_rep); 92 93 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count) 94 { 95 _outsb((u8 __iomem *) addr, src, count); 96 } 97 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count) 98 { 99 _outsw_ns((u16 __iomem *) addr, src, count); 100 } 101 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count) 102 { 103 _outsl_ns((u32 __iomem *) addr, src, count); 104 } 105 EXPORT_SYMBOL(iowrite8_rep); 106 EXPORT_SYMBOL(iowrite16_rep); 107 EXPORT_SYMBOL(iowrite32_rep); 108 109 void __iomem *ioport_map(unsigned long port, unsigned int len) 110 { 111 if (!_IO_IS_VALID(port)) 112 return NULL; 113 return (void __iomem *) (port+pci_io_base); 114 } 115 116 void ioport_unmap(void __iomem *addr) 117 { 118 /* Nothing to do */ 119 } 120 EXPORT_SYMBOL(ioport_map); 121 EXPORT_SYMBOL(ioport_unmap); 122 123 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) 124 { 125 unsigned long start = pci_resource_start(dev, bar); 126 unsigned long len = pci_resource_len(dev, bar); 127 unsigned long flags = pci_resource_flags(dev, bar); 128 129 if (!len) 130 return NULL; 131 if (max && len > max) 132 len = max; 133 if (flags & IORESOURCE_IO) 134 return ioport_map(start, len); 135 if (flags & IORESOURCE_MEM) 136 return ioremap(start, len); 137 /* What? */ 138 return NULL; 139 } 140 141 void pci_iounmap(struct pci_dev *dev, void __iomem *addr) 142 { 143 /* Nothing to do */ 144 } 145 EXPORT_SYMBOL(pci_iomap); 146 EXPORT_SYMBOL(pci_iounmap); 147